Arrowhead attaching means



Sept. 17, 1968 F. B. BEAR 3,401,938

ARROWHEAD ATTACHING MEANS Filed Nov. 2, 1966 INVENT OR FRED B.BEAR

ATTORNEY United States Patent 3,401,938 ARROWHEAD A'ITACHING MEANS FredB. Bear, Grayling, Mich., assignor, by mesne assignments, to VictorComptometer Corporation, Chicago, Ill., a corporation of IllinoisContinuation-impart of application Ser. No. 495,835,

Oct. 14, 1965. This application Nov. 2, 1966, Ser.

5 Claims. (Cl. 273-1065) ABSTRACT OF THE DISCLOSURE A hollow arrow shaftand arrowhead assembly including an anchor member insertable within theshaft and having means thereon frictionally engaging the member to theinterior of the shaft and also providing a threaded connection for thereleaseable attachment of the arrowhead.

This is a continuation-in part of application No. 495,- 835, nowabandoned.

This invention relates generally to archery apparatus, and moreparticularly to arrows having removable and interchangeable heads.

The advantages of an arrow provided with means for interchanging thehead thereof are numerous and well known, the principal advantageresiding within the ease with which the archer may change from say ahunting arrowhead tip to a target or field arrowhead. Such anarrangement obviates the necessity of an archer having to pack a largenumber of arrows of various types whenever embarking on a trip so thathe will be sure to be prepared for any type of shooting. With thepresent invention an archer nee-d only have a single set of his favoritetype, size and weight of arrow shafts and, utilizing these, he may adaptany of numerous types of arrowheads thereto by a simple maneuver whilein the field and without the necessity of requiring any tools or otherparaphernalia to adapt the arrow shaft to a specific head.

Arrows with replaceable or interchangeable heads are not new as such;however, with the advent of the hollow glass arrow shafts which arebecoming increasingly popular, the problem of providing for aninterchangeable arrowhead has become quite apparent, particularly inview of the relatively fragile nature of this type of shaft immediatelyadjacent its area of attachment to the ar rowhead. Practically all ofthe replaceable arrowhead type of arrows solve the problem of rectifyinga damaged arrowhead tip alone since this portion of the arrow assemblycan be readily replaced. However, this feature has been of little usewhen the arrow shaft itself has also been damaged due to impact of thearrow with a hard object, such as a stone, etc., which latter damage ismost prevalent when using glass arrow shafts.

Many efforts in the past to provide arrows having replaceable arrowheadshave met with little success due to the insecure attachment of thearrowhead anchor means to the arrow shaft. The present constructionovercomes this shortcoming which often arose when the arrow struck arelatively fixed or hard object and caused the arrowhead to recoil fromthe arrow shaft.

Accordingly, one of the primary objects of the present invention is toprovide an arrow comprising a shaft having an easily removed andreplaced arrowhead.

Another object of the present invention is to provide an arrow havingimproved anchoring means in the forward portion of the shaft thereof forreceiving any one of the several types of arrowheads.

A further object of the present invention is to provide an arrow havinga removable arrowhead and including mounting means comprising an anchorscrew 3,401,938 Patented Sept. 17, 1968 ICC provided with locking meansfor securing the anchor screw to the arrow shaft.

Still another object of the present invention is to provide an arrowcomprising a shaft of relatively fragile material and containingsupporting means at the forward portion thereof, which supporting meansincludes anchoring means for the removable attachment of any one of aplurality of arrowheads.

With these and other objects in view, which will more readily appear asthe nature of the invention is better understood, the invention consistsin the novel construction, combination, and arrangement of partshereinafter more fully described, illustrated and claimed.

A preferred and practical embodiment of the invention is shown in theaccompanying drawing in which:

FIGURE 1 is an exploded perspective view of an arrow according to thepresent invention;

FIG. 2 is a side elevation, partly in section, of the assembledcomponents of FIGURE 1;

FIG. 3 is a side elevation, partly in section, of an embodiment of thepresent invention;

FIG. 4 is a perspective view of an alternate type of arrowhead used inconjunction with the present invention; and

FIG. 5 is a perspective view of still another type of arrowhead whichmay be used in conjunction with the present invention.

FIG. 6 is a side elevation, partly in section, of a modification of thepresent invention.

FIG. 7 is an enlarged perspective view of the anchor screw shown in FIG.6.

Similar reference characters designate corresponding parts throughoutthe several views of the drawing.

Referring now to the drawing, particularly FIG. 1, it will be seen thatthe present invention comprises a plurality of components which whenassembled as illustrated in FIG. 2 provide an arrow assembly, generallydesignated 1, adapted to offer a high degree of resistance to any suddenimpact or shock which the arrow may be subjected to.

The assembly 1 comprises, a hollow arrow shaft of a relatively fragilematerial such as glass designated 2. Adapted to be inserted within theforward end of the arrow shaft is a support sleeve 3 comprising acylindrical tube preferably constructed of aluminum or other materialhaving a substantially greater resistance to impact than the arrow shaft2 itself. The support sleeve 3 is provided with an outside diametercorresponding to the inside diameter of the arrow shaft 2 and is adaptedto be inserted into the forward portion of the arrow shaft with itsforward abutment surface 4 disposed flush with the forward abutmentsurface 5 of the arrow shaft. A close press-type fit is desired betweenthe juxtaposed surfaces of the inserted sleeve and arrow shaft. However,to preclude subsequent axial displacement of these two components, anysuitable adhesive material (not shown) is used to rigidly interlock thesupport sleeve Within the arraw shaft when in the assembled position asshown in FIG. 2.

As shown in the drawing, any of various types of arrowheads may be usedin conjunction with the present invention. FIGURES 1-3 disclose abroadhead for a hunting-type of arrowhead 6 while FIG. 4 discloses atarget or field arrowhead 7 and FIG. 5 illustrates a blunt arrowhead 8'.A feature common to all of the arrowheads utilized in the presentinvention is that each includes a cylindrical tang 9 attached to thebase thereof including a central internally threaded bore 10.Surrounding the tang 9 at its juncture with the base of the arrowhead isa circular shoulder 11. The shoulder 11 presents a fiat surfaceperpendicular to the longitudinal axis of the arrow shaft and is of awidth sufficient to completely overlie the combined widths of theabutments 4 and 5 of the support sleeve 3 and arrow shaft 2,respectively, as will be most clearly seen in the assembled view of FIG.2. The outside diameter of the tang 9 is such as to provide a closesliding fit with the inside diameter of the support sleeve 3.

Fixedly disposed within the support sleeve 3 is an anchor screwgenerally designated 12 and comprising a head 13 and a forwardlyprojecting threaded mounting shaft 14. The head 13 is constructed toprovide a tight press fit within the support sleeve 3 and, as shown inthe drawing, may be knurled to further enhance the rigid interlocking ofthese two components by preventing axial displacement therebetween oncethe anchor screw is forcibly installed. With the anchor screw 12positioned as shown in FIG. 2 within the sleeve 3, the tang 9 of theselected arrowhead is inserted within the forward open end of the arrowshaft containing the supporting sleeve and pushed rearwardly until thethreaded mounting shaft 14 of the anchor screw engages the internalthreaded bore 10 of the arrowhead. Rotation of the arrowhead then drawsthe tang 9 rearwardly further into the arrow shaft as the mounting shaftthreads 14 mate and turn within the threaded bore 10 of the tang. Thearrowhead is turned until the shoulder 11 thereof tightly engages theflush abutments 4 and 5 of the support sleeve 3 and arrow shaft 2.

From the foregoing it will be seen that an arrow assembly is providedpermitting of rapid attachment and replacement of any of various typesof arrowheads which when in the assembled position as shown in FIG. 2insures an absolute perfect alignment of the arrowhead with the centrallongitudinal axis of the arrow shaft by means of the tang 9 securelyanchored and centered within the arrow shaft. It will now be apparentthat the anchor screw and tang cooperate to insure this alignment whilethe abutment of the shoulder 11 of the arrowhead with the assembledsupport sleeve and arrow shaft provides strength and rigidity to aheretofore somewhat fragile assembly.

The embodiment illustrated in FIG. 3 illustrates an adaptation of thepresent invention to an arrow assembly comprising an aluminum or othertype metal arrow shaft 2a. With a metal arrow shaft it is not absolutelynecessary to include additional supporting means such as the sleeve 3 asaforementioned and, accordingly, the anchor screw 12 may be press-fitteddirectly into the internal bore of the metal arrow shaft 2a as shown inFIG. 3. The manner of attaching and removing the various arrowheads isthe same in this embodiment as in the previously described form.

A further embodiment illustrated in FIGS. 6 and 7, although shown incombination with a shaft 2 of the glass fiber type, may of courseutilize other forms of shafts such as the metal shaft 2a of FIG. 3. Theprimary distinction afforded by this latter embodiment is the manner ofmore securely mounting the anchor screw which is most clearly shown inFIG. 7.

The anchor screw 15 may be constructed of any suitable material, similarto the anchor screw, illustrated in FIGS. 1-3; however, experience hasshown that a synthetic plastic composition such as nylon is mostdesirable. A threaded mounting shaft 14a is provided on the anchor screwadjacent the head 13a which is perfectly substantially longer than thehead 13 and may include a plurality of axially spaced peripheral groovesor ridges.

In order to preclude the recoiling of the anchor screw from within thehollow shaft should the assembled arrow strike a relatively fixed orhard object, additional locking means are included to more positivelysecure the anchor screw within either the support sleeve 3 or shaft 2a.This means comprises a metal washer 16 which is mounted upon the anchorscrew 15 at the juncture of the mounting shaft 14a and head 13a as mostclearly shown in FIG. 7 of the drawing. A critical feature of thisarrangement is the relative dimensions of the components of the arrowassembly. It will be understood that for purposes of clarity theillustration in the drawing is exaggerated. The outer diameter of themetal washer is selected so as to exceed, by a small degree, the innerdiameter of either the support sleeve 3 or arrow shaft 2a. It has beenfound that a washer 16 with an OD. .002" greater than the ID. of themating shaft 2a or sleeve 3 adequately provides additional security aswill be described immediately hereinafter.

The diameter of the head 13a may be equal to the ID. of the sleeve orshaft since it will be understood that by nature, the plasticcomposition of the anchor screw 15 will exhibit a slight deformabilitydue to its inherent resilience and thus may be installed by means of aforce fit. It is the inclusion of the slightly oversize metal washer 16that provides the more permanent attachment of the screw anchor since,during the insertion thereof, it will be seen that the washer 16 whichis preferably of steel, will actually scrape the juxtaposed periphery ofthe sleeve or shaft which will assume a swaged assembled therewith inview of the softer, more yieldable nature of the aluminum or glass fibershafting.

It is to be understood that the invention is not limited to the specificfeatures shown, but that the means of construction herein disclosedcomprise the preferred form of several modes of putting the inventioninto effect and the invention will therefore be understood in any of itsforms or modifications within the legitimate and valid scope of theappended claims.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. An arrow comprising, a shaft having a hollow forward portion, athreaded anchor member secured within said hollow portion, an arrowheadbody provided with a rearwardly disposed tang having an exterior matingfit within said shaft and including threaded means engageable with saidthreaded anchor member, shoulder means on said arrowhead abutting saidshaft when said threaded means is tightened about said anchor member, ahollow sleeve mounted within said shaft with its forward end flush withthe end of said shaft, and said anchor member secured within said sleeveand including a head and a forwardly directed threaded mounting shaft.

2. An arrow comprising, a shaft provied with a hollow forward portion, asupport sleeve disposed within said shaft with its outer end flush withthe end of said shaft, a threaded anchor member mounted within saidsleeve, an arrowhead body including a rearwardly disposed tang, saidtang forming a mating fit when inserted within said sleeve and havingthreaded means engageable with said threaded anchor member, shouldermeans on said arrowhead abutting the flush ends of said shaft and sleevewhen said threaded means is tightened about said anchor member, saidanchor member including a head secured within said sleeve and aforwardly directed threaded mounting shaft of lesser diameter than saidhead.

3. An arrow comprising, a shaft having a hollow forward portion, athreaded anchor member secured within said hollow portion, an arrowheadbody provided with a hollow rearwardly disposed tang having an exteriormating fit within said shaft and including internally threaded meansengageable with said threaded anchor member, said anchor memberincluding a head having a diameter substantially equal to the innerdiameter of said shaft hollow portion, metal locking means carried bysaid anchor member, said locking means having a diameter greater thanboth said anchor head and the inner diameter of said shaft hollowportion, and shoulder means on said arrowhead abutting said shaft whensaid threaded means is tightened about said anchor member.

4. An arrow comprising, a shaft having a hollow forward portion, athreaded anchor member secured within said hollow portion, an arrowheadbody provided with a rearwardly disposed tang having an exterior matingfit within said shaft and including threaded means engageable with saidthreaded anchor member, said anchor member including a head having adiameter substantially equal to the inner diameter of said hollowportion, metal locking means carried by said anchor member, said lockingmeans having a diameter greater than the inner diameter of said shafthollow portion, a mounting shaft adjacent said anchor head, said lockingmeans comprising a washer disposed on said mounting shaft juxtaposedsaid anchor head, and shoulder means on said arrowhead abutting saidshaft when said threaded means is tightened about said anchor member.

5. An arrow comprising, a shaft having a hollow forward portion, athreaded anchor member of synthetic plastic secured within said hollowportion, an arrowhead body provided with a rearwardly disposed tanghaving an exterior mating fit within said shaft and including threadedmeans engageable with said threaded anchor member, said anchor memberincluding a head having a ened about said anchor member.

References Cited UNITED STATES PATENTS 2,289,284 7/ 1942 Chandler273106.5

FOREIGN PATENTS 717,353 10/1954 Great Britain.

RICHARD C. PINKHAM, Primary Examiner.

P. E. SHAPIRO, Assistant Examiner.

